package com.jingdianjichi.gateway.auth;

import cn.dev33.satoken.stp.StpInterface;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.jingdianjichi.gateway.entitiy.AuthPermission;
import com.jingdianjichi.gateway.entitiy.AuthRole;
import com.jingdianjichi.gateway.redis.RedisUtil;
import org.springframework.stereotype.Component;
import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;

/**
 * 自定义权限验证接口扩展 
 */
@Component
public class StpInterfaceImpl implements StpInterface {

    @Resource
    private RedisUtil redisUtil;

    private String authPermissionPrefix="auth:permission";
    private String authRolePrefix="auth:role";
    @Override
    public List<String> getPermissionList(Object loginId, String loginType) {
        return getAuth(loginId.toString(),authPermissionPrefix);

    }
    @Override
    public List<String> getRoleList(Object loginId, String loginType) {
        return getAuth(loginId.toString(),authRolePrefix);
    }
    public List<String> getAuth(Object loginId,String prefix){
        // 返回此 loginId 拥有的权限列表
        //如果请求都从数据库校验容易崩
        //所以都采用redis缓存校验
        //采用redis加mysql也要考虑缓存穿透击穿等问题所以只采用redis
        String authKey=redisUtil.buildKey(authPermissionPrefix,loginId.toString());
        String authValue=redisUtil.get(authKey);
        if(authValue==null){
            return Collections.emptyList();
        }
        List<String> authList = new LinkedList<>();
        if (authRolePrefix.equals(prefix)) {
            List<AuthRole> roleList = new Gson().fromJson(authValue, new TypeToken<List<AuthRole>>() {
            }.getType());
            authList = roleList.stream().map(AuthRole::getRoleKey).collect(Collectors.toList());
        } else if (authPermissionPrefix.equals(prefix)) {
            List<AuthPermission> permissionList = new Gson().fromJson(authValue, new TypeToken<List<AuthPermission>>() {
            }.getType());
            authList = permissionList.stream().map(AuthPermission::getPermissionKey).collect(Collectors.toList());
        }
        return authList;

    }



}
